baber/WOPTO huggingface dataset:
Patent GB-380876-A (GB)
Title: Improvements in or relating to radio signalling systems
IPC: H03D3/12
Filed: 1931-07-13
Abstract: 380,876. Wireless receiving systems ; valve circuits. ARMSTRONG, E. H., 221, Central Park West, New York, U.S.A. July 13, 1931, No. 20034. Convention date, July 30, 1930. [Class 40 (v).] In the reception of frequency modulated waves, the frequency variations in one current derived from the wave are translated into amplitude variations and these are heterodyned by another current derived from the wave, so that the efficiency of rectification is increased and the effects of disturbances are diminished. In the application of the invention to telegraphy reception, a radio frequency receiver 6, Fig. 1, feeds a detector system 8, 9 also coupled to a heterodyning source 10, for producing a beat current of frequency of the order of 1,000 which passes to an amplifier 11 and thence to a double translator system 13 .. 21, as described in Specification 290,642, [Class 40 (v), Wireless signalling &c.]. The latter comprises phasing members 13, 14, 15 and circuits A, B tuned to say 1200 and 1250 cycles respectively, the marking and spacing waves being separated by 50 cycles and reduced to these frequencies by the heterodyne 10. These frequencies are supplied alternately to the amplifiers 26, 27, feeding rectifiers 30, 31 and recorder 44 arranged in bridge fashion with resistances 32, 33. The e.m.f. across resistances 19, 20 in the translator system is amplified by the system 34 .. 42 which supplies frequency-modulated current symmetrically to the rectifiers 30, 31 through the transformer 42, 43, producing a heterodyning action therein, the phase of the heterodyning current being brought into exact agreement or opposition by members 37.. 40, 45, 46 For receiving telephony a superheterodyne frequency changer and I.F. amplifier 50, 51, Fig. 2, feed a current limiter 52, leading to a band-pass filter 53 whence signals pass to a single translator circuit 58, 59, 60 across which are tapped two amplifiers 61, 62 with the same gain but whose outputs are in phase opposition and are applied to balanced rectifiers 66, 67. The output from the latter is applied to a signal indicator 72 and heterodyning current, fed in phase agreement to the two rectifiers across the common resistance 65, is obtained from across the coil 60, through the limiter 70 and phasing condenser 71, reaching the rectifiers either in complete phase agreement or opposition with the currents from amplifiers 61, 62. The current limiters minimize the effects of fading, and undesired signals or static are balanced out in the balanced rectifier system.
Patent GB-502564-A (GB)
Title: Improvements in combined propelling and steering device for screw-propelled ships
IPC: B63H5/15
Filed: 1937-07-20
Abstract: 502,564. Screw propellers. KORT, L. July 20, 1937, No. 20124. Addition to 443,362. [Class 114] Propeller plant comprising a screw propeller surrounded by a tubular nozzle according to the parent Specification is modified in that the nozzle is pivotally mounted and connected up for movement in the manner of a rudder. A tubular nozzle 3 which in crosssection is of aerofoil form is mounted by means of a pintle 7 and shaft 6 in a foot-step 9 and bearing 8. The section in different planes containing the axis varies, that along the horizontal plane being of larger cross-section and lesser axial length than that in the vertical plane, the leading edge 13, 12 being as shown in dotted line. Within the nozzle may be fitted forward vertical vanes 16 and after vertical and horizontal vanes 14, 15 for assisting in directing the flow to and from propeller 4.
Patent GB-709683-A (GB)
Title: Improvements in the production of lines of stitching of predetermined form
Inventor: BIHALY LAJOS
IPC: D05B21/00
Filed: 1950-02-03
Abstract: 709,683. Sewing - machines. TRUBENISED (GT. BRITAIN), Ltd. Dec. 20, 1950 [Feb. 3, 1950], No. 20153/52. Divided out of 709,621. Drawings to Specification. Class 112 A line of stitching including a sharply curved part and a straight or less sharply curved part is produced in a sewing- machine by securing the work in a holder which is mechanically guided past the needle at a rate which varies so that the stitches forming the sharply curved part of the line are shorter than the remainder; the sharply curved part of the line can thus be formed accurately while the stitching of the other part can be done faster. The apparatus used is described in Specification 709,621. Specification 709,642 also is referred to.
Patent GB-876238-A (GB)
Title: Apparatus for measuring the total activity discharged from a radioactive fluid disposal plant
Inventor: SMITH GEORGE DONALD
IPC: G01T1/15
Filed: 1958-06-24
Abstract: 876,238. Measuring radio-activity. PLESSEY CO. Ltd. June 16, 1959 [June 24, 1958], No. 20170/58. Class 40(3) The total radio-activity which is being discharged from a plant disposing of radio-active materials is derived from a measurement of the instantaneous activity by applying the radiation detector output, which comprises randomly spaced impulses at a mean repetition rate proportional to the instantaneous activity, to a gate circuit which is opened by periodic pulses, Fig. 2, from a generator 2 which is controlled so that the time duration t of each pulse is determined by a D.C. voltage V proportional to the flow rate of material from the plant. The output of the gate is applied to a scaling circuit 4, whose count thus indicates total activity and a register 5 which, if desired, may control the printing of the total activity at predetermined intervals. The D.C. voltage V is obtained from a flow measuring device including a suitable electrical transducer. In fluid disposal plants, for example, a differential pressure proportional to flow rate may be produced by an orifice plate or Venturi tube and employed to generate the D.C. voltage. A second embodiment of the invention, Fig. 3 (not shown), utilizes a mechanical system in which contacts forming the gate are controlled by an integrating motor which is started up at regular intervals and runs at a speed determined by the D.C. voltage V, the contacts being operated for the time taken by a shaft driven by the motor to complete one revolution. Where the specific activity is sufficiently low that background activity constitutes a serious error, provision may be made to subtract impulses proportional to the background activity from the input fed to gate. This may be effected by including a further gate (not shown) before gate4whichis controlled by a counter (not shown) at regular intervals, e.g. once per second, so as to open and allow the passage impulses to gate only after a predetermined number of pulses equal to the mean background rate have arrived. The counter setting may be controlled manually or automatically by a servo system operating from a background monitor. The instantaneous activity may be measured by the equipment described in Specification 876,237.
Patent GB-192032-A (GB)
Title: Manufacture of sodium nitrate
IPC: C01D9/02
Filed: 1922-07-24
Abstract: Crushed caliche together with fines is leached at atmospheric or tepid temperatures, not higher than about 60 DEG  C., so as to bring the available nitrate into complete solution.  The enriched liquors mixed with stabilizing agents of the kind described in Specification 188,634, to avoid contamination of nitrate with sulphate crystals, are passed through heat exchangers, the temperature range being e.g. 25 DEG  C. to 6 DEG  C., and then subjected to agitation and further cooling, e.g. to 0 DEG  C., in refrigerators to remove a portion of the nitrate content by crystallization. Mother-liquor returns to the leaching tanks through the heat interchangers, and through the ammonia condenser in cases where cooling is effected by ammonia vaporization.  Impurities consisting mainly of sodium chloride and sodium sulphate remain in solution at the temperature of the heat interchangers from which nitrate crystals substantially free from sulphate are obtained. Further, with the production of solutions of high concentration in nitrate and in the presence of stabilizing agents, the concentration of sulphate is maintained low enough to permit of the crystallization of substantially pure nitrate during vaporization at or below 0 DEG  C.  The nitrate product is obtained in crystals of uniform size, has a potassium content of about 0.5 to 0.7 per cent and in general not exceeding 1 per cent, a perchlorate content not in excess of about 0.1 per cent and is relatively non-hygroscopic.
Patent GB-1033880-A (GB)
Title: A convertible toy firearm
Inventor: RONCI JOHN NAZARETH
IPC: F41C23/12
Filed: 1965-05-14
Abstract: 1, 033, 880. Toy guns. BELRON DE MEXICO S.A. May 14, 1965, No. 20392/65. Heading A6S. A toy comprises a revolver 12 which is convertible into a rifle by the addition of a front housing 29, a barrel 33 and a stock 21. The housing 29 and barrel 33 is clamped to the revolver 12 by a ring 36, and the stock 21 slides over a boss 18 on the stock 16 of the revolver and is secured thereto by a screw 28.
Patent GB-1162510-A (GB)
Title: Manufacture of Reconstituted Tobacco Products
IPC: A24B15/12
Filed: 1968-04-30
Abstract: 1,162,510. Reconstituted tobacco. AMERICAN MACHINE & FOUNDRY CO. 30 April, 1968 [17 May, 1967], No. 20442/68. Heading A2C. In the manufacture of reconstituted tobacco, in order to reduce the darkening of the tobacco when it is exposed to heat, the tobacco is extracted with water and the polyphenols present in the resulting aqueous solution are selectively removed therefrom prior to recombining the aqueous solution with the extracted tobacco. The polyphenols are removed by adsorption by passing the extract through a column, preferably of activated alumina. Other adsorbents specified are polyamide, silica gel, magnesium silicate, silicic acid and adsorption alumina. The reformed polyphenol-free water-tobacco mixture is pressure cooked prior to forming into a reconstituted tobacco sheet.
Patent GB-927357-A (GB)
Title: Metal-clad electric high voltage switchgear
IPC: H02G5/00
Filed: 1959-06-15
Abstract: 927,357. Switchgear structures. MOSERGLASER & CO. A.G., and A. REYROLLE & CO. Ltd. June 15, 1959 [June 13, 1958], No. 20520/59. Addition to 753,375. Drawings to Specification. Class 38 (5). In the metal-clad switchgear of the parent Specification, the coupling joints are provided with potential gradient control by incorporating condenser foils in one side of the joint, or in both sides of the joint, or in a coupling member interposed between the units to be coupled.
Patent GB-645978-A (GB)
Title: An improved reel for fly fishing
IPC: A01K89/01
Filed: 1948-08-03
Abstract: 645,978. Toothed gearing. ETABLISSEMENTS CARPANO & PONS, and PONS, C. Aug. 3, 1948, Nos. 20530/48 and 20116/49. [Class 80(i)] [Also in Group VI] In a stationary spool reel, the handle shaft 5 carries a double-gear wheel 15, 16, the wheel 15 acting through bevel gearing 19, 20 to rotate the drum 7, and the wheel 16 acting through reduction gearing to reciprocate the spool 10. The last wheel 24 of the reduction gear carries three pins 26 which sequentially engage a double slide rack 27 connected by a pin 30 to a rod 31 which carries the spool.
Patent GB-1312982-A (GB)
Title: Salt bath carburising process
IPC: C23C8/46
Filed: 1970-04-29
Abstract: 1312982 Salt-bath carburizing DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT 29 April 1970 [29 April 1969] 20531/70 Heading C7U In a salt-bath carburising process using a bath of molten cyanide containing as activator an alkaline earth metal chloride and a third salt which may be a carbonate, the peripheral carbon content of the carburised articles in controlled by replenishing the bath with a fused salt mixture whose activator content is identical with that of the initial bath. The replenishing salt may consist only of cyanide and activator. A fall in level of the bath caused by drag-out is compensated by adding a further quantity of the initial peparation salt.
Patent GB-496600-A (GB)
Title: Improvements in the moulding of articles of rubber
Filed: 1937-07-26
Abstract: 496,600. Moulding rubber by injection. GOLDSCHMIDT, M. July 26,1937, No. 20565. Convention date, Oct. 23, 1936. [Class 87 (ii)] In apparatus for moulding rubber articles wherein the rubber is forced by a plunger 13 from a feed chamber 12 through passages 15 into a mould 1, 2, pins 16 are provided on the piston and adapted to move into and reduce the effective cross-section of the passages 15 as the plunger moves down. The passages 15 may be of conical shape. The invention is shown as applied to moulding shock-absorbing bushings formed of metal rings 3, 4, embedded in rubber. The mould is in two parts 1, 2 constructed as a cylinder having an arched bottom. The passages 15 are provided in the top part 1. The piston 13 is provided with a cover-plate 14 and guide-pins 17 registering with bores 18 in the mould. The pins 16 close the passages and cut off the rubber when the mould is filled. The rings 3 are held in grooves in the mould parts and the rings 4 are held in grooves in a four-part sleeve 5 secured between discs 8 on a mandrel 9 by a nut 11.
Patent GB-148858-A (GB)
Title: Improvements in and relating to ribbon and wire annealing stoves
IPC: C21D9/56
Filed: 1920-07-10
Abstract: 148,858. Mansfeld'sche Kupferschiefer Bauende Gewerkschaft. Feb. 18, 1918, [Convention date]. Annealing-furnaces; muffle furnaces.-Metal ribbon or wire is annealed in an inclined furnace so that the weight of the material, which is supported on the hearth, is sufficient, or nearly sufficient, to carry it through the furnace. The wire &c. as it leaves the furnace is wound on a drum d. In the case of the muffle furnace shown, the heating gases enter at g and pass to the recuperator at h. The entry and exit of the furnace may be water-sealed, and it may then be filled with a neutral gas.
Patent GB-651465-A (GB)
Title: Improvements in and relating to heat-exchange conductors
IPC: B23K11/00
Filed: 1947-07-30
Abstract: 651,465. Tubular heat-exchange elements. BROWN FINTUBB CO. July 30, 1947, No. 20641. Convention date, Nov. 14, 1938. [Class 64(iii)] [Also in Group XXII] A heat-exchange element comprises a tube 15 with a plurality of fin members projecting from the surface of the tube, each fin member having a base portion 16 and at least one flange 17 the base being united to the tube by a series of evenlyspaced spot welds of a combined area substantially equal to the longitudinal crosssectional area of the flange or flanges and the total perimetric length of the welds substantially equal to the total length of the flange or flanges. The fins may be channel-shaped members, Fig. 1, with the web 16 conforming to the outer surface tube the channel members being placed symmetrically round the tube and welded at least two at a time using a single pair of electrodes. The fins may be arranged annularly on the tube as in Fig. 5, two welds being made simultaneously at diametrically opposite points using electrodes 27, 28. Roller electrodes may be used to produce the spot welds, Fig. 6, two channel-shaped fin members being placed on opposite sides of the tube and electrodes 22 placed in the channels. Rollers 23, 24 at the end of a forked rod or mandrel 25 and connected by a brace 26 are placed inside the tube. The welding current travels from the upper electrode 22 through the web 16 of one fin member and the pipe 15 to roller 23 and through the mandrel to the roller 24 and hence through the pipe and the second fin member to the other electrode 22. Alternatively the mandrel 25 may be used as one electrode and the two rollers 22 joined to make the other electrode. The fins may also be arranged spirally on the tube.
Patent GB-675448-A (GB)
Title: Improvements in and relating to apparatus for digital computation
IPC: H01J31/06
Filed: 1950-08-21
Abstract: 675,448. Digital electric calculating-apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 21, 1950 [Aug. 27, 1949], No. 20681/50. Class 106 (i). In an electronic computing apparatus of the kind having a cathode-ray tube with deflecting means arranged to be energized by input signals to deflect the electron beam in two mutually perpendicular directions to a discrete zone whose position in relation to the undeflected beam represents the result of an arithmetical operation, the discrete zones are formed by target electrodes adapted to supply, when struck by the electron beam, positive or negative output signals. In one embodiment which serves as a binary adding device having three input channels, the target in a cathode-ray tube comprises six plates 15 ... 20, Fig. 3, arranged as shown. In the normal or zero condition the electron beam falls on the target 15, but a positive pulse of unit value, representing the binary digit 1, when applied to a deflector plate 4 shifts the beam to target 16, or if applied to deflector plate 6 shifts the beam to target 18. Positive pulses arriving simultaneously at plates 4 and 6 would shift the beam to target 19, registering a binary " 2 " (10), while a negative pulse applied via an inverter 21 to a deflector plate 5 would cause an additional shift to the left. Either positive or negative output voltages may be produced as desired by proper choice of materials for the targets. The output signal representing the answer in binary form, is conveyed to two output wires via buffer devices where necessary to prevent spurious pulses. Voltage limiters may be employed. Since the pair of targets 16, 18 on the one hand, and 17, 19 on the other hand, represent the same output values and are, therefore, wired together, each pair can be replaced by a single diagonally arranged target, Fig. 1 (not shown), thus giving four targets in all. Fig. 6 shows, diagrammatically, two inputs 30, 31, introducing to the adding device of Fig. 3 binary, series-mode pulse trains representing'two numbers to be added; the higher or carry digit at the output is fed back through a delay device 32 so as to be re-introduced as a third input one pulse time later. Fig. 7 shows, diagrammatically, an arrangement of the adding devices 33 ... 37 for parallel operation. In another embodiment the need for a voltage inverter is eliminated by using eight targets in the cathode-ray tube. In yet another embodiment provision is made for subtractive operations. In another embodiment, Fig. 9 (not shown), an increased number of targets with independent electrical connections provides for a separate output signal for each possible combination of four binary inputs, and can be used for binary to decimal conversion.
Patent GB-1157300-A (GB)
Title: A process for preparing a Graft-Copolymerised Cellulose
Inventor: IMOTO MINORU
IPC: C08B15/00
Filed: 1967-05-04
Abstract: 1,157,300. Cellulose graft polymers. M. IMOTO, K. TAKEMOTO and CHING YUN HUANG. 4 May, 1967 [11 May, 1966], No. 20737/67. Heading C3G. A graft polymerization process comprises heating in the liquid state at 40 to 100 C. a cellulose, at least one vinyl or vinylidene monomer and water in the absence of a polymerization catalyst and an emulsifying agent. The cellulose may be wood, leaf, stern, baste or seed fibre cellulose or pulp. The heating may be carried out under 1 to 10 atmospheres pressure (gauge). In the examples, needle-leaf tree pulp is grafted with methyl, ethyl, isobutyl or 2- ethoxyethyl methacrylate or methacrylic acid, or with a mixture of methyl methacrylate and ethyl, n-butyl, glycidyl, 2-diethylaminoethyl or 2-hydroxyethyl methacrylate, methacrylic acid, styrene, methyl or ethyl acrylate, acrylamide or a acrylonitrile, or with a mixture of ethyl methacrylate and methyl alpha-chloroacrylate, 2-ethylhexyl methacrylate, 2-diethylaminoethyl methacrylate, diethyleneglycol monomethacrylate glycidyl methacrylate, methacrylic acid, N-methylol acrylamide, ethyl vinyl ether, N-vinyl carbazole, methyl acrylate or vinyl chloride; cellulose pulp is grafted with methyl methacrylate and butadiene; cellulose is grafted with methyl methacrylate and styrene; hemp which has been treated with caustic soda is grafted with methyl methacrylate and glycidyl methacrylate and cotton is grafted with ethyl methacrylate and methacrylic acid.
Patent GB-531305-A (GB)
Title: Improvements in impulse senders of the type used in telephone systems
IPC: H04M1/272
Filed: 1939-07-18
Abstract: 531,305. Automatic exchange systems. GENERAL ELECTRIQ CO., Ltd., CHUBB, A. A., and WHEATCROFT, L. July 18,1939, No. 20837. Drawings to Specifications. [Class 40 (iv)] In a keyboard-sender of the registering type, the setting of the registers is maintained after impulse transmission so that the number may be re-transmitted under the control of a repeat key. The invention is applied to the sender described in Specification 490,325, in which the digits are distributed to groups of storage condensers by a switch D and a sending switch is brought under the control of the condenser groups in succession by a sequence switch C. Before keying, the operator actuates a dialling key which has the effect of bringing the switches D, C to a normal position. Actuation of the repeat key brings only the sequence switch C to normal so that the sending operations are repeated. In order to avoid leakage, each condenser found charged during the sending operations is connected momentarily to charging potential and each condenser found uncharged is momentarily short-circuited.